Usage of PAN (permanent account number) by companies as a common identifier for all digital systems of specified government agencies will help in expediting clearances and promote ease of doing business, a top official said on Thursday. The announcement regarding PAN was made by Finance Minister Nirmala Sitharaman in her Budget speech on Wednesday. PAN is a 10-digit alphanumeric number allotted by the income tax department to a person, firm or entity. Secretary in the Department for Promotion of Industry and Internal Trade (DPIIT) Anurag Jain termed the decision as reformative and transformative.